A ground wire de-icing suspension string with adjustable arc angle gap distance

Abstract

This utility model discloses an adjustable ground wire de-icing suspension string with adjustable arc angle gap, belonging to the field of power fittings technology. It mainly includes a branch suspension string, a tower-end fitting assembly, a clamp-end fitting assembly, and a ground wire. An upper suspension arc angle assembly, electrically connected to the tower-end fitting assembly, is fixedly mounted thereon. The upper suspension arc angle assembly includes a mounting plate and an electrode portion. A lower suspension arc angle assembly, electrically connected to the clamp-end fitting assembly, is fixedly mounted thereon. The lower suspension arc angle assembly includes a single plate and a connecting plate. A lower component electrode portion, opposite to the upper component electrode portion, is fixedly mounted on the connecting plate, with the upper and lower component electrode portions spaced apart. This utility model has strong versatility, can adapt to diverse environments, and can be widely applied to ground wire de-icing systems for transmission lines of different voltage levels.

Description

Technical Field

[0001] This utility model belongs to the field of power fittings technology. Specifically, it relates to a ground wire de-icing suspension string with adjustable arc angle gap distance, which has a simple structural design, flexible and adjustable arc angle gap distance, and can adapt to different voltage levels and diverse environmental conditions. Background Technology

[0002] The ground wire de-icing insulation suspension string is a special hardware-insulator combination structure designed to solve the problem of ground wire icing in transmission lines. Its core function is to make the ground wire, which was originally directly grounded, insulated from the tower during de-icing by applying DC current to achieve de-icing, while retaining the lightning protection grounding capability during normal operation.

[0003] Chinese patent publication number CN207895922U discloses a ground wire de-icing insulation suspension string, specifically disclosing the following technical solution: It includes hanging point hardware, a U-shaped hanging ring, a double-plate, connecting hardware, a ground wire de-icing composite insulator, and a ground wire suspension clamp. The upper end of the hanging point hardware is connected to the engineering tower, and the connection point needs to be determined according to the actual hanging point type of the engineering tower. The lower end of the hanging point hardware is connected to the double-plate via a U-shaped hanging ring at the middle position. A string of ground wire de-icing composite insulators is connected to the lower ends of the double-plate via connecting hardware. A ground wire suspension clamp is connected to the bottom end of each string of ground wire de-icing composite insulators. The connecting hardware is either a hanging plate or a hanging ring, and the ground wire suspension clamp is connected to the ground wire.

[0004] Traditional ground wire de-icing insulation suspension strings primarily employ two arc-initiating angle designs: a single arc-initiating angle design and a fixed-gap double arc-initiating angle design (i.e., the arc-initiating angle gap distance is fixed). The single arc-initiating angle design lacks a complete arc control circuit, allowing the arc to randomly burn the insulator surface during lightning strikes or overvoltage, leading to insulation degradation or even permanent damage. Therefore, the fixed-gap double arc-initiating angle design is more widely used. However, the fixed-gap suspension string design cannot adapt to lines with different voltage levels, such as 10kV, 110kV, and 500kV lines, where normal operating voltage and overvoltage levels vary significantly. A fixed gap distance will lead to mis-discharge or ineffective arc initiation. Furthermore, the fixed-gap suspension string design struggles to meet diverse needs in complex environments. For example, in high-altitude areas where the air breakdown field strength is reduced, or in heavily polluted areas where the insulator surface insulation performance changes, the fixed gap cannot be flexibly adjusted. This may result in a gap that is too small, leading to mis-discharge, or a gap that is too large, preventing timely arc initiation. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a ground wire de-icing suspension string with adjustable arc angle gap distance, which features a simple structural design, flexible and adjustable arc angle gap distance, adaptability to different voltage levels, and adaptability to diverse environmental conditions.

[0006] This utility model is achieved through the following technical solution:

[0007] An adjustable ground wire de-icing suspension string with adjustable arc-angle gap includes a branch suspension string. The upper end of the insulator string of the branch suspension string is a tower-end hardware assembly, and the lower end of the insulator string is suspended from the ground wire via a clamp-end hardware assembly. An upper suspension arc-angle component, electrically connected to the tower-end hardware assembly, is fixedly mounted thereon. The upper suspension arc-angle component includes an upper component mounting plate fixedly connected to the tower-end hardware assembly, and an upper component electrode portion fixedly integrated with the upper component mounting plate. An upper suspension arc-angle component, electrically connected to the clamp-end hardware assembly, is fixedly mounted thereon. A lower component for drooping arc angle; the lower component for drooping arc angle includes a single plate fixedly connected to the wire clamp end fitting assembly. The single plate has multiple adjustment holes evenly spaced and arranged sequentially in a single direction. A lower component connecting plate connected to the single plate has multiple corresponding holes adapted to the adjustment holes. The lower component connecting plate is electrically fixedly connected to the single plate using a detachable installation method. A lower component electrode portion is fixedly provided on the lower component connecting plate, opposite to the upper component electrode portion, and the upper component electrode portion and the lower component electrode portion are spaced apart.

[0008] Preferably, the tower end hardware assembly includes a ball head hanging ring connected to the upper end of the insulator string, the ball head hanging ring, the tower end hanging plate, and the tower end right angle hanging plate are connected in sequence, and the tower end hanging plate is electrically fixedly connected to the upper component mounting plate;

[0009] The clamp end hardware assembly includes a bowl-shaped hanging plate connected to the lower end of the insulator string. The bowl-shaped hanging plate, the clamp hanging plate, and the clamp end right-angle hanging plate are connected in sequence. The clamp end right-angle hanging plate is connected to a suspension clamp for suspending the ground wire.

[0010] Preferably, the number of branch suspension strings is two; the tower end hardware assemblies of the two branch suspension strings are respectively connected to the connection holes of the two insulator strings of the delta plate, and the tower side connection hole of the delta plate is connected to the EB hanging plate through the U-shaped hanging ring, and the EB hanging plate is suspended on the tower.

[0011] Preferably, the upper component electrode portion is electrically and fixedly connected to the upper component mounting plate by welding; the lower component electrode portion is electrically and fixedly connected to the lower component connecting plate by welding.

[0012] Preferably, the upper component electrode is a plate-shaped electrode, and the lower component electrode is a round steel rod-shaped electrode.

[0013] Preferably, the upper component mounting plate is connected to the tower end hanging plate by bolt fastening; the head end of the single plate is connected to the line clamp hanging plate by bolt fastening, and the adjustment end of the single plate is connected to the lower component connecting plate by bolt fastening.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention is highly versatile, allowing for free adjustment of the arc-starting gap distance L according to actual scenarios. It can adapt to lines of different voltage levels and can be flexibly adjusted to meet the insulation requirements of suspension strings, preventing accidental discharge or ineffective arc ignition. This invention can cope with diverse environments, such as high-altitude areas where thin air reduces the air breakdown field strength, requiring an increased gap distance; and polluted areas where the surface insulation performance of insulators deteriorates, potentially necessitating a reduction in the gap distance to ensure reliable arc ignition.

[0016] This utility model has a simple and reasonable structural design, is easy to manufacture, convenient and quick to install, and has low difficulty in high-altitude construction. It can be widely used in power transmission line ground wire de-icing systems. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model. Figure 1 .

[0018] Figure 2 This is a schematic diagram of the structure of this utility model. Figure 2 .

[0019] Figure 3 This is a utility model Figure 2 Local magnification Figure 1 .

[0020] Figure 4 This is a utility model Figure 2 Local magnification Figure 2 .

[0021] In the diagram: 1. Insulator string; 2. Tower end hardware assembly; 21. Ball head hanging ring; 22. Tower end hanging plate; 23. Tower end right angle hanging plate; 3. Wire clamp end hardware assembly; 31. Bowl head hanging plate; 32. Wire clamp hanging plate; 33. Wire clamp end right angle hanging plate; 4. Ground wire; 51. Suspension arc angle upper assembly; 511. Upper assembly mounting plate; 512. Upper assembly electrode part; 52. Suspension arc angle lower assembly; 521. Single plate; 5211. Adjustment hole; 522. Lower assembly connecting plate; 5221. Corresponding hole; 523. Lower assembly electrode part; 6. Suspension wire clamp; 71. Triangular connecting plate; 72. U-shaped hanging ring; 73. EB hanging plate. Detailed Implementation

[0022] To enable readers to better understand the design intent of this utility model, the technical solution described below is further described in conjunction with embodiments. It should be noted that directional terms that may appear in the following paragraphs, including but not limited to "up," "down," "left," "right," "front," and "back," are based on the visual orientation shown in the accompanying drawings and should not be considered as limitations on the scope of protection or technical solution of this utility model. Their purpose is solely to facilitate a better understanding of the technical solution described in this utility model by those skilled in the art.

[0023] In this specification, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] Example 1

[0025] like Figures 1 to 4 As shown, an adjustable ground wire de-icing suspension string with adjustable arc angle gap includes a branch suspension string. The upper end of the insulator string 1 of the branch suspension string is a tower end hardware assembly 2, and the lower end of the insulator string 1 is suspended by a ground wire 4 via a wire clamp end hardware assembly 3. A suspension arc angle upper assembly 51, which is electrically connected to the tower end hardware assembly 2, is fixedly mounted on it. The suspension arc angle upper assembly 51 includes an upper assembly mounting plate 511 fixedly connected to the tower end hardware assembly 2, and an upper assembly electrode part 512 fixedly integrated with the upper assembly mounting plate 511.

[0026] A lower component 52 for maintaining electrical conductivity is fixedly mounted on the wire clamp end hardware assembly 3. The lower component 52 includes a single plate 521 fixedly connected to the wire clamp end hardware assembly 3. The single plate 521 has multiple adjustment holes 5211 arranged sequentially in a single direction at equal intervals. A lower component connecting plate 522 connected to the single plate 521 has multiple corresponding holes 5221 that match the adjustment holes 5211. The single plate 521 is detachably and electrically fixedly connected to the lower component connecting plate 522. A lower component electrode portion 523 is fixedly mounted on the lower component connecting plate 522, opposite to the upper component electrode portion 512, and the upper component electrode portion 512 and the lower component electrode portion 523 are spaced apart. In this embodiment, the conductive fixed connection means maintaining electrical conductivity while maintaining a mechanical fixed connection. Figure 2As shown in the figure, L represents the arc angle gap distance. When the value of L needs to be adjusted according to different grade lines or different construction environments, first release the locking force between the single board 521 and the lower component connecting plate 522. After the locking force is released, the lower component connecting plate 522 can move relative to the single board 521 along... Figure 4 The direction of the arrow shown can be adjusted back and forth. Changing the relative distance between the lower component connecting plate 522 and the single plate 521 can change the value of L. Because the lower component electrode part 523 and the lower component connecting plate 522 are fixed together, changing the position of the lower component connecting plate 522 will inevitably change the position of the lower component electrode part 523, thereby changing the relative distance between the upper component electrode part 512 and the lower component electrode part 523.

[0027] This embodiment is highly versatile, allowing for free adjustment of the arc-starting gap distance L according to actual scenarios. It can adapt to lines of different voltage levels and can be flexibly adjusted to meet the insulation requirements of the suspension string, avoiding accidental discharge or ineffective arc ignition. This embodiment can cope with diverse environments, such as high-altitude areas where thin air reduces the air breakdown field strength, requiring an increased gap distance; and polluted areas where the surface insulation performance of the insulator decreases, potentially requiring a reduced gap distance to ensure reliable arc ignition.

[0028] Example 2

[0029] Based on Embodiment 1, this embodiment continues to describe in detail the technical features involved therein and the functions and roles of these technical features in this utility model, so as to help those skilled in the art to fully understand the technical solution of this utility model and reproduce it.

[0030] like Figures 1 to 4 As shown, an adjustable ground wire de-icing suspension string with adjustable arc angle gap includes a branch suspension string. The upper end of the insulator string 1 of the branch suspension string is a tower end hardware assembly 2, and the lower end of the insulator string 1 is suspended by a ground wire 4 via a wire clamp end hardware assembly 3. A suspension arc angle upper assembly 51, which is electrically connected to the tower end hardware assembly 2, is fixedly mounted on it. The suspension arc angle upper assembly 51 includes an upper assembly mounting plate 511 fixedly connected to the tower end hardware assembly 2, and an upper assembly electrode part 512 fixedly integrated with the upper assembly mounting plate 511.

[0031] A drooping arc angle lower component 52, which is electrically connected to the wire clamp end hardware assembly 3, is fixedly mounted on it. The drooping arc angle lower component 52 includes a single plate 521 fixedly connected to the wire clamp end hardware assembly 3. The single plate 521 has multiple adjustment holes 5211 arranged sequentially in a single direction at equal intervals. The lower component connecting plate 522, which is connected to the single plate 521, has multiple corresponding holes 5221 that are adapted to the adjustment holes 5211. The single plate 521 is detachably and electrically fixedly connected to the lower component connecting plate 522. The lower component connecting plate 522 is fixedly mounted with a lower component electrode part 523 that is disposed opposite to the upper component electrode part 512, and the upper component electrode part 512 and the lower component electrode part 523 are spaced apart. In this embodiment, the upper component mounting plate 511 is connected to the tower end hanging plate 22 by bolt fastening; the head end of the single plate 521 is connected to the wire clamp hanging plate 32 by bolt fastening, and the adjustment end of the single plate 521 is connected to the lower component connecting plate 522 by bolt fastening. Operation is simple and convenient, and high-altitude work is easy.

[0032] In this embodiment, the adjustment process for the arc angle gap distance L is as follows: When it is necessary to reduce the value of L, loosen the bolt fasteners between the single plate 521 and the lower component connecting plate 522, move the lower component connecting plate 522 closer to the head of the single plate 521, and after moving it to the required position, tighten the bolt fasteners to fix the lower component connecting plate 522 and the single plate 521. At this time, the relative distance between the upper component electrode part 512 and the lower component electrode part 523 decreases. When it is necessary to increase the value of L, simply reverse the operation.

[0033] In this embodiment, the tower end hardware assembly 2 includes a ball-head hanging ring 21 connected to the upper end of the insulator string 1. The ball-head hanging ring 21, the tower end hanging plate 22, and the tower end right-angle hanging plate 23 are connected in sequence. The tower end hanging plate 22 is electrically fixedly connected to the upper assembly mounting plate 511. The clamp end hardware assembly 3 includes a bowl-head hanging plate 31 connected to the lower end of the insulator string 1. The bowl-head hanging plate 31, the clamp hanging plate 32, and the clamp end right-angle hanging plate 33 are connected in sequence. The clamp end right-angle hanging plate 33 is connected to a suspension clamp 6 for suspending the ground wire 4. The tower end hardware assembly 2 and the clamp end hardware assembly 3 are existing technologies. The tower end hardware assembly 2 is the connecting hardware assembly for the insulator string 1 in the tower direction, and the clamp end hardware assembly 3 is the connecting hardware assembly for the insulator string 1 in the suspension clamp direction. The tower end hardware assembly 2 and the clamp end hardware assembly 3 can be adjusted according to actual engineering needs.

[0034] In this embodiment, there are two branch suspension strings. The tower end hardware assemblies 2 of the two branch suspension strings are respectively connected to the connection holes of the two insulator strings of the triangular connecting plate 71. The tower side connection holes of the triangular connecting plate 71 are connected to the EB hanging plate 73 through the U-shaped hanging ring 72. The EB hanging plate 73 is suspended on the tower. That is, this embodiment is a double-connected double-wire clamped ground wire de-icing suspension string. The EB hanging plate 73 can be directly suspended on the tower, or indirectly suspended on the tower through hardware such as the U-shaped hanging ring.

[0035] In this embodiment, the upper component electrode 512 is electrically and fixedly connected to the upper component mounting plate 511 by welding; the lower component electrode 523 is electrically and fixedly connected to the lower component connecting plate 522 by welding. The upper component electrode 512, upper component mounting plate 511, lower component electrode 523, and lower component connecting plate 522 are all made of metal. The welding method ensures both good electrical contact and sufficient mechanical strength. Furthermore, the upper component electrode 512 is a plate-shaped electrode, and the lower component electrode 523 is a round steel rod-shaped electrode.

[0036] This embodiment is highly versatile, allowing for free adjustment of the arc-starting gap distance L according to actual scenarios. It can adapt to lines of different voltage levels and can be flexibly adjusted to meet the insulation requirements of the suspension string, avoiding accidental discharge or ineffective arc ignition. This invention can cope with diverse environments, such as high-altitude areas where thin air reduces the air breakdown field strength, requiring an increased gap distance; and polluted areas where the surface insulation performance of the insulator decreases, potentially necessitating a reduction in the gap distance to ensure reliable arc ignition.

[0037] This embodiment features a simple and reasonable structural design, is easy to manufacture, convenient and quick to install, and has low difficulty in high-altitude construction. It can be widely used in power transmission line ground wire de-icing systems.

[0038] In summary, this is merely a preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model. All equivalent variations and modifications made in accordance with the shape, structure, features and spirit of the claims of the present utility model should be included within the scope of the claims of the present utility model.

Claims

1. A ground wire de-icing suspension string with adjustable arc angle gap distance, comprising a branch suspension string, wherein the upper end of the insulator string (1) of the branch suspension string is a tower end hardware assembly (2), and the lower end of the insulator string (1) is suspended from the ground wire (4) via a wire clamp end hardware assembly (3), characterized in that: The tower end fitting assembly (2) is fixedly provided with a suspended arc angle upper assembly (51) that is electrically connected to it; the suspended arc angle upper assembly (51) includes an upper assembly mounting plate (511) fixedly connected to the tower end fitting assembly (2), and an upper assembly electrode part (512) fixedly integrated with the upper assembly mounting plate (511). The clamp end fitting assembly (3) is fixedly provided with a suspension arc angle lower assembly (52) that is electrically connected to it; the suspension arc angle lower assembly (52) includes a single plate (521) fixedly connected to the clamp end fitting assembly (3), the single plate (521) is provided with a plurality of adjustment holes (5211) arranged sequentially in a single direction at equal intervals, the lower assembly connecting plate (522) connected to the single plate (521) is provided with a plurality of corresponding holes (5221) adapted to the adjustment holes (5211), the lower assembly connecting plate (522) is electrically fixedly connected to the single plate (521) in a detachable installation manner; the lower assembly connecting plate (522) is fixedly provided with a lower assembly electrode part (523) that is opposite to the upper assembly electrode part (512), and the upper assembly electrode part (512) and the lower assembly electrode part (523) are spaced apart.

2. The adjustable arc angle gap distance ground wire de-icing suspension string according to claim 1, characterized in that: The tower end hardware assembly (2) includes a ball head hanging ring (21) connected to the upper end of the insulator string (1). The ball head hanging ring (21), the tower end hanging plate (22), and the tower end right angle hanging plate (23) are connected in sequence. The tower end hanging plate (22) is electrically fixedly connected to the upper component mounting plate (511). The clamp end hardware assembly (3) includes a bowl head hanging plate (31) connected to the lower end of the insulator string (1). The bowl head hanging plate (31), the clamp hanging plate (32), and the clamp end right angle hanging plate (33) are connected in sequence. The clamp end right angle hanging plate (33) is connected to a suspension clamp (6) for suspending the ground wire (4).

3. The adjustable arc angle gap distance ground wire de-icing suspension string according to claim 2, characterized in that: The number of branch suspension strings is two; the tower end hardware assemblies (2) of the two branch suspension strings are respectively connected to the two insulator string connection holes of the triangular connecting plate (71), and the tower side connection hole of the triangular connecting plate (71) is connected to the EB hanging plate (73) through the U-shaped hanging ring (72), and the EB hanging plate (73) is suspended on the tower.

4. The adjustable arc angle gap distance ground wire de-icing suspension string according to claim 1, characterized in that: The upper component electrode part (512) is electrically and fixedly connected to the upper component mounting plate (511) by welding; the lower component electrode part (523) is electrically and fixedly connected to the lower component connecting plate (522) by welding.

5. A ground wire de-icing suspension string with adjustable arc angle gap distance according to claim 1 or 4, characterized in that: The upper component electrode part (512) is a plate-shaped electrode, and the lower component electrode part (523) is a round steel rod-shaped electrode.

6. The adjustable arc angle gap distance ground wire de-icing suspension string according to claim 1, characterized in that: The upper component mounting plate (511) is connected to the tower end hanging plate (22) by bolt fastening; the head end of the single plate (521) is connected to the wire clamp hanging plate (32) by bolt fastening, and the adjustment end of the single plate (521) is connected to the lower component connecting plate (522) by bolt fastening.

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